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  1. An image uses 512 x 512 picture elements. Each of the picture elements can take any of the 8 distinguishable intensity levels. The maximum entropy in the above image will be

    2. A.
    2097152 bits
    B.
    786432 bits
    C.
    648 bits
    D.
    144 bits

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    Answer : Option B

    Explanation :

    Picture elements (pixel) = 512 x 512 = 262144

    Information per picture element N = log2 M

    M = 2N

    8 = 2N

    N = 3

    Information for 262144 pixels = 262144 x 3 = 786432 bits

    Entropy is same as average information per message.

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